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Assertion: In Newlands’s octaves, the properties of lithium and sodium were found to be same. Reasons: Sodium is the eighth element after lithium.a) Both A and R are true, and R is correct explanation of the assertion.b) Both A and R are true, but R is not the correct explanation of the assertion.c) A is true, but R is false.d) A is false, but R is true.

Answer»

(a) Both A and R are true, and R is correct explanation of the assertion



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